CVE-2021-21400 Entering code in App Lock modal sends input to conversation
Attackers can steal app-lock passphrases if users type them without focusing the input field, as the text is sent to the active chat.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-21400?
CVE-2021-21400 is a high-severity vulnerability in wireapp wire-webapp, published on 2 Apr 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
wire-webapp is an open-source front end for Wire, a secure collaboration platform. In wire-webapp before version 2021-03-15-production.0, when being prompted to enter the app-lock passphrase, the typed passphrase will be sent into the most recently used chat when the user does not actively give focus to the input field. Input element focus is enforced programatically in version 2021-03-15-production.0.
Weakness: CWE-200
Which versions are affected by CVE-2021-21400?
It affects 1 product.
Products include Wire Wire-Webapp.
How do I fix CVE-2021-21400?
No fix has been published for CVE-2021-21400 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-21400 being exploited?
There is no known exploitation of CVE-2021-21400 in the wild and no public exploit code.
Other vulnerabilities in wireapp wire-webapp
- CVE-2022-29168 Cross Site Scripting in Wire Messages
- CVE-2022-24799 Cross Site Scripting in Wire Webapp
- CVE-2021-32683 XSS through createObjectURL
- CVE-2025-48066 wire-webapp has no database deletion on client logout
- CVE-2022-39380 wire-webapp contains Improper Handling of Exceptional Conditions leading to a DoS via Markdown Rendering
Sources
Also known as GHSA-cxwr-f2j3-q8hp.